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(declare (uses common))
(declare (uses db))
(declare (uses tests))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.
(include "common_records.scm")
(include "db_records.scm")
(define (server:make-server-url hostport)
(if (not hostport)
#f
(conc "tcp://" (car hostport) ":" (cadr hostport))))
(define *server-loop-heart-beat* (current-seconds))
(define *heartbeat-mutex* (make-mutex))
(define (server:self-ping iface port)
(let ((zsocket (server:client-connect iface port)))
(let loop ()
(thread-sleep! 2)
(cdb:client-call zsocket 'ping #t)
(debug:print 4 "server:self-ping - I'm alive on " iface ":" port "!")
(mutex-lock! *heartbeat-mutex*)
(set! *server-loop-heart-beat* (current-seconds))
(mutex-unlock! *heartbeat-mutex*)
(loop))))
(define (server:run hostn)
(debug:print 0 "Attempting to start the server ...")
(if (not *toppath*)
(if (not (setup-for-run))
(begin
(debug:print 0 "ERROR: cannot find megatest.config, cannot start server, exiting")
(exit))))
(let* ((zmq-socket #f)
(zmq-socket-dat #f)
(iface (if (string=? "-" hostn)
"*" ;; (get-host-name)
hostn))
(hostname (get-host-name))
(ipaddrstr (let ((ipstr (if (string=? "-" hostn)
(string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
#f)))
(if ipstr ipstr hostname)))
(actual-port #f))
;; (set! zmq-socket (server:find-free-port-and-open iface zmq-socket 5555 0))
(set! zmq-socket-dat (server:find-free-port-and-open ipaddrstr zmq-socket (if (args:get-arg "-port")
(string->number (args:get-arg "-port"))
(+ 5000 (random 1001)))
0))
(set! zmq-socket (cadr zmq-socket-dat))
(set! actual-port (caddr zmq-socket-dat))
(open-run-close tasks:server-deregister-self tasks:open-db ipaddrstr))
(let loop ()
(let ((queue-len 0))
(thread-sleep! (random 5))
(mutex-lock! *incoming-mutex*)
(set! queue-len (length *incoming-data*))
(mutex-unlock! *incoming-mutex*)
(if (> queue-len 0)
(begin
(debug:print-info 0 "Queue not flushed, waiting ...")
(loop))))))))
;; The heavy lifting
;;
(let loop ()
;; ;; Ugly yuk.
;; (mutex-lock! *incoming-mutex*)
;; (set! *server-loop-heart-beat* (list 'waiting (current-seconds)))
;; (mutex-unlock! *incoming-mutex*)
(let* ((rawmsg (receive-message* zmq-socket))
;;; Ugly yuk.
;; (mutex-lock! *incoming-mutex*)
;; (set! *server-loop-heart-beat* (list 'working (current-seconds)))
;; (mutex-unlock! *incoming-mutex*)
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(declare (uses common))
(declare (uses db))
(declare (uses tests))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.
(include "common_records.scm")
(include "db_records.scm")
;; Transition to pub --> sub with pull <-- push
;;
;; 1. client sends request to server via push to the pull port
;; 2. server puts request in queue or processes immediately as appropriate
;; 3. server puts responses from completed requests into pub port
;;
;; TODO
;;
;; Done Tested
;; [x] [ ] 1. Add columns pullport pubport to servers table
;; [x] [ ] 2. Add rm of monitor.db if older than 11/12/2012
;; [x] [ ] 3. Add create of pullport and pubport with finding of available ports
;; [ ] [ ] 4. Add client compose of request
;; [ ] [ ] - name of client: testname/itempath-test_id-hostname
;; [ ] [ ] - name of request: callname, params
;; [ ] [ ] - request key: f(clientname, callname, params)
;; [ ] [ ] 5. Add processing of subscription hits
;; [ ] [ ] - done when get key
;; [ ] [ ] - return results
;; [ ] [ ] 6. Add timeout processing
;; [ ] [ ] - after 60 seconds
;; [ ] [ ] i. check server alive, connect to new if necessary
;; [ ] [ ] ii. resend request
(define (server:make-server-url hostport)
(if (not hostport)
#f
(conc "tcp://" (car hostport) ":" (cadr hostport))))
(define *server-loop-heart-beat* (current-seconds))
(define *heartbeat-mutex* (make-mutex))
(define (server:self-ping iface port)
(let ((zsocket (server:client-connect iface port)))
(let loop ()
(thread-sleep! 2)
(cdb:client-call zsocket 'ping #t)
(debug:print 4 "server:self-ping - I'm alive on " iface ":" port "!")
(mutex-lock! *heartbeat-mutex*)
(set! *server-loop-heart-beat* (current-seconds))
(mutex-unlock! *heartbeat-mutex*)
(loop))))
(define-inline (zmqsock:get-pub dat)(vector-ref dat 0))
(define-inline (zmqsock:get-pull dat)(vector-ref dat 1))
(define-inline (zmqsock:set-pub! dat s)(vector-set! dat s 0))
(define-inline (zmqsock:set-pull! dat s)(vector-set! dat s 0))
(define (server:run hostn)
(debug:print 0 "Attempting to start the server ...")
(if (not *toppath*)
(if (not (setup-for-run))
(begin
(debug:print 0 "ERROR: cannot find megatest.config, cannot start server, exiting")
(exit))))
(let* ((zmq-sdat1 #f)
(zmq-sdat2 #f)
(zmq-socket1 #f)
(zmq-socket2 #f)
(p1 #f)
(p2 #f)
(zmq-sockets-dat #f)
(iface (if (string=? "-" hostn)
"*" ;; (get-host-name)
hostn))
(hostname (get-host-name))
(ipaddrstr (let ((ipstr (if (string=? "-" hostn)
(string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
#f)))
(if ipstr ipstr hostname))))
(set! zmq-sockets-dat (server:setup-ports ipaddrstr (if (args:get-arg "-port")
(string->number (args:get-arg "-port"))
(+ 5000 (random 1001)))))
(set! zmq-sdat1 (car zmq-socket-dat))
(set! zmq-socket1 (car zmq-sdat1))
(set! p1 (caddr zmq-sdat1))
(set! zmq-sdat2 (cadr zmq-socket-dat))
(set! zmq-socket2 (car zmq-sdat2))
(set! p2 (caddr zmq-sdat2))
(set! *cache-on* #t)
;; (set! th1 (make-thread (lambda ()
;; (server:self-ping ipaddrstr actual-port))))
;; (thread-start! th1)
;; what to do when we quit
;;
(on-exit (lambda ()
(if (and *toppath* *server-info*)
(begin
(open-run-close tasks:server-deregister-self tasks:open-db ipaddrstr p1 p2))
(let loop ()
(let ((queue-len 0))
(thread-sleep! (random 5))
(mutex-lock! *incoming-mutex*)
(set! queue-len (length *incoming-data*))
(mutex-unlock! *incoming-mutex*)
(if (> queue-len 0)
(begin
(debug:print-info 0 "Queue not flushed, waiting ...")
(loop))))))))
;; The heavy lifting
;;
(let loop ()
(let* ((rawmsg (receive-message* zmq-socket1))
(params (db:string->obj rawmsg)) ;; (with-input-from-string rawmsg (lambda ()(deserialize))))
(res #f))
(debug:print-info 12 "server=> received params=" params)
(set! res (cdb:cached-access params))
(debug:print-info 12 "server=> processed res=" res)
(send-message zmq-socket (db:obj->string res))
(if (not *time-to-exit*)
(loop)
(begin
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(set! *time-to-exit* #t)
(open-run-close tasks:server-deregister-self tasks:open-db (get-host-name))
(thread-sleep! 1)
(debug:print-info 0 "Max cached queries was " *max-cache-size*)
(debug:print-info 0 "Server shutdown complete. Exiting")
(exit)))))))
(define (server:find-free-port-and-open iface s port #!key (trynum 50))
(let ((s (if s s (make-socket 'rep)))
(p (if (number? port) port 5555))
(old-handler (current-exception-handler)))
(handle-exceptions
exn
(begin
(debug:print 0 "Failed to bind to port " p ", trying next port")
(debug:print 0 " EXCEPTION: " ((condition-property-accessor 'exn 'message) exn))
;; (old-handler)
;; (print-call-chain)
(if (> trynum 0)
(server:find-free-port-and-open iface s (+ p 1) trynum: (- trynum 1))
(debug:print-info 0 "Tried ports up to " p
" but all were in use. Please try a different port range by starting the server with parameter \" -port N\" where N is the starting port number to use")))
(let ((zmq-url (conc "tcp://" iface ":" p)))
(print "Trying to start server on " zmq-url)
(bind-socket s zmq-url)
(set! *runremote* #f)
(debug:print 0 "Server started on " zmq-url)
(mutex-lock! *heartbeat-mutex*)
(set! *server-info* (open-run-close tasks:server-register tasks:open-db (current-process-id) iface p 0 'live))
(mutex-unlock! *heartbeat-mutex*)
(list iface s port)))))
(define (server:client-connect iface port #!key (context #f))
(debug:print-info 3 "client-connect " iface ":" port)
(let ((connect-ok #f)
(zmq-socket (if context
(make-socket 'req context)
(make-socket 'req)))
(conurl (server:make-server-url (list iface port))))
(if (socket? zmq-socket)
(begin
(connect-socket zmq-socket conurl)
zmq-socket)
#f)))
(define (server:client-login zmq-socket)
(cdb:login zmq-socket *toppath* (server:get-client-signature)))
(define (server:client-logout zmq-socket)
(let ((ok (and (socket? zmq-socket)
(cdb:logout zmq-socket *toppath* (server:get-client-signature)))))
;; (close-socket zmq-socket)
ok))
;; Do all the connection work, start a server if not already running
(define (server:client-setup #!key (numtries 50))
(if (not *toppath*)
(if (not (setup-for-run))
(begin
(debug:print 0 "ERROR: failed to find megatest.config, exiting")
(exit))))
(let ((hostinfo (open-run-close tasks:get-best-server tasks:open-db)))
(if hostinfo
(let ((host (car hostinfo))
(iface (cadr hostinfo))
(port (caddr hostinfo)))
(debug:print-info 2 "Setting up to connect to " hostinfo)
(handle-exceptions
exn
(begin
;; something went wrong in connecting to the server. In this scenario it is ok
;; to try again
(debug:print 0 "ERROR: Failed to open a connection to the server at: " hostinfo)
(debug:print 0 " EXCEPTION: " ((condition-property-accessor 'exn 'message) exn))
(debug:print 0 " perhaps jobs killed with -9? Removing server records")
(open-run-close tasks:server-deregister tasks:open-db host port: port)
(server:client-setup (- numtries 1))
#f)
(let* ((zmq-socket (server:client-connect iface port))
(login-res (server:client-login zmq-socket))
(connect-ok (if (null? login-res) #f (car login-res)))
(conurl (server:make-server-url (list iface port))))
(if connect-ok
(begin
(debug:print-info 2 "Logged in and connected to " conurl)
(set! *runremote* zmq-socket)
#t)
(begin
(debug:print-info 2 "Failed to login or connect to " conurl)
(set! *runremote* #f)
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(set! *time-to-exit* #t)
(open-run-close tasks:server-deregister-self tasks:open-db (get-host-name))
(thread-sleep! 1)
(debug:print-info 0 "Max cached queries was " *max-cache-size*)
(debug:print-info 0 "Server shutdown complete. Exiting")
(exit)))))))
(define (server:find-free-port-and-open iface s port stype #!key (trynum 50))
(let ((s (if s s (make-socket stype)))
(p (if (number? port) port 5555))
(old-handler (current-exception-handler)))
(handle-exceptions
exn
(begin
(debug:print 0 "Failed to bind to port " p ", trying next port")
(debug:print 0 " EXCEPTION: " ((condition-property-accessor 'exn 'message) exn))
;; (old-handler)
;; (print-call-chain)
(if (> trynum 0)
(server:find-free-port-and-open iface s (+ p 1) trynum: (- trynum 1))
(debug:print-info 0 "Tried ports up to " p
" but all were in use. Please try a different port range by starting the server with parameter \" -port N\" where N is the starting port number to use"))
(exit)) ;; To exit or not? That is the question.
(let ((zmq-url (conc "tcp://" iface ":" p)))
(debug:print 0 "Trying to start server on " zmq-url)
(bind-socket s zmq-url)
(list iface s port)))))
(define (server:setup-ports ipadrstr startport)
(let* ((s1 (server:find-free-port-and-open ipadrstr #f startport 'pub))
(p1 (caddr s1))
(s2 (server:find-free-port-and-open ipadrstr #f (+ 1 (if p1 p1 (+ startport 1))) 'pull))
(p2 (caddr s2)))
(set! *runremote* #f)
(debug:print 0 "Server started on " ipaddrstr " ports " p1 " and p2")
(mutex-lock! *heartbeat-mutex*)
(set! *server-info* (open-run-close tasks:server-register tasks:open-db (current-process-id) iface p 0 'live))
(mutex-unlock! *heartbeat-mutex*)
(list s1 s2)))
(define (server:mk-signature)
(message-digest-string (md5-primitive)
(with-output-to-string
(lambda ()
(write (list (current-directory)
(argv)))))))
(define (server:get-client-signature)
(if *my-client-signature* *my-client-signature*
(let ((sig (server:mk-signature)))
(set! *my-client-signature* sig)
*my-client-signature*)))
;;
(define (server:client-connect iface port #!key (context #f)(type 'req))
(debug:print-info 3 "client-connect " iface ":" port)
(let ((connect-ok #f)
(zmq-socket (if context
(make-socket type context)
(make-socket type)))
(conurl (server:make-server-url (list iface port))))
(if (socket? zmq-socket)
(begin
(connect-socket zmq-socket conurl)
zmq-socket)
#f)))
(define (server:client-login zmq-sockets)
(cdb:login zmq-sockets *toppath* (server:get-client-signature)))
(define (server:client-logout zmq-socket)
(let ((ok (and (socket? zmq-socket)
(cdb:logout zmq-socket *toppath* (server:get-client-signature)))))
;; (close-socket zmq-socket)
ok))
;; Do all the connection work, start a server if not already running
(define (server:client-setup #!key (numtries 50))
(if (not *toppath*)
(if (not (setup-for-run))
(begin
(debug:print 0 "ERROR: failed to find megatest.config, exiting")
(exit))))
(let ((hostinfo (open-run-close tasks:get-best-server tasks:open-db)))
(if hostinfo
(let ((host (list-ref hostinfo 0))
(iface (list-ref hostinfo 1))
(pullport (list-ref hostinfo 2))
(pubport (list-ref hostinfo 3)))
(debug:print-info 2 "Setting up to connect to " hostinfo)
(handle-exceptions
exn
(begin
;; something went wrong in connecting to the server. In this scenario it is ok
;; to try again
(debug:print 0 "ERROR: Failed to open a connection to the server at: " hostinfo)
(debug:print 0 " EXCEPTION: " ((condition-property-accessor 'exn 'message) exn))
(debug:print 0 " perhaps jobs killed with -9? Removing server records")
(open-run-close tasks:server-deregister tasks:open-db host port: port)
(server:client-setup (- numtries 1))
#f)
(let* ((push-socket (server:client-connect iface pullport 'push))
(sub-socket (server:client-connect iface pubport 'sub))
(zmq-sockets (vector push-socket sub-socket))
(login-res #f)
;; (connect-ok
(conurl (server:make-server-url (list iface port))))
(socket-option-set! sub-socket 'subscribe (server:get-client-signature))
(set! login-res (server:client-login zmq-sockets))
(if (and (not (null? login-res))
(car login-res))
(begin
(debug:print-info 2 "Logged in and connected to " conurl)
(set! *runremote* zmq-socket)
#t)
(begin
(debug:print-info 2 "Failed to login or connect to " conurl)
(set! *runremote* #f)
|